求高手给出以下JAVA代码的DES加密解密方法的对应的C#的DES加密解密方法

Java密码学结构设计遵循两个原则:

1) 算法的独立性和可靠性。

2) 实现的独立性和相互作用性。

算法的独立性是通过定义密码服务类来获得。用户只需了解密码算法的概念,而不用去关心如何实现这些概念。实现的独立性和相互作用性通过密码服务提供器来实现。密码服务提供器是实现一个或多个密码服务的一个或多个程序包。软件开发商根据一定接口,将各种算法实现后,打包成一个提供器,用户可以安装不同的提供器。安装和配置提供器,可将包含提供器的ZIP和JAR文件放在CLASSPATH下,再编辑Java安全属性文件来设置定义一个提供器。

DES算法及如何利用DES算法加密和解密类文件的步骤：

DES算法简介

DES（Data Encryption Standard）是发明最早的最广泛使用的分组对称加密算法。DES算法的入口参数有三个：Key、Data、Mode。其中Key为8个字节共64位，是DES算法的工作密钥；Data也为8个字节64位，是要被加密或被解密的数据；Mode为DES的工作方式，有两种：加密或解密。

DES加密算法的C语言实现，实在很长

>

''' <summary>

''' 二进制文件流加密类

''' </summary>

''' <remarks></remarks>

Public Class EncryptionDES

''' <summary>

''' 默认密钥向量

''' </summary>

''' <remarks></remarks>

Private Shared Keys As Byte() = New Byte() {&H12, &H34, &H56, 120, &H90, &HAB, &HCD, &HEF}

''' <summary>

''' 文件加密

''' </summary>

''' <param name="encryptBy">待加密文件流</param>

''' <param name="encryptKey">密钥</param>

''' <returns></returns>

''' <remarks></remarks>

Public Shared Function EncryptDES(ByVal encryptBy As Byte(), ByVal encryptKey As String) As Byte()

Dim mStream As MemoryStream = Nothing

Dim cStream As CryptoStream = Nothing

Try

Dim rgbKey As Byte() = EncodingUTF8GetBytes(encryptKeySubstring(0, 8))

Dim rgbIV As Byte() = Keys

Dim dCSP As New DESCryptoServiceProvider

mStream = New MemoryStream

cStream = New CryptoStream(mStream, dCSPCreateEncryptor(rgbKey, rgbIV), CryptoStreamModeWrite)

cStreamWrite(encryptBy, 0, encryptByLength)

cStreamFlushFinalBlock()

Return mStreamToArray

Catch

Return encryptBy

Finally

mStreamDispose()

mStreamClose()

cStreamFlush()

cStreamDispose()

cStreamClose()

End Try

End Function

''' <summary>

''' 文件解密

''' </summary>

''' <param name="decryptBy">待解密文件流</param>

''' <param name="decryptKey">密钥</param>

''' <returns></returns>

''' <remarks></remarks>

Public Shared Function DecryptDES(ByVal decryptBy As Byte(), ByVal decryptKey As String) As Byte()

Dim mStream As MemoryStream = Nothing

Dim cStream As CryptoStream = Nothing

Try

Dim rgbKey As Byte() = EncodingUTF8GetBytes(decryptKey)

Dim rgbIV As Byte() = Keys

Dim DCSP As New DESCryptoServiceProvider

mStream = New MemoryStream

cStream = New CryptoStream(mStream, DCSPCreateDecryptor(rgbKey, rgbIV), CryptoStreamModeWrite)

cStreamWrite(decryptBy, 0, decryptByLength)

cStreamFlushFinalBlock()

Return mStreamToArray

Catch

Return decryptBy

Finally

mStreamDispose()

mStreamClose()

cStreamFlush()

cStreamDispose()

cStreamClose()

End Try

End Function

End Class

Private Sub Button1_Click(ByVal sender As SystemObject, ByVal e As SystemEventArgs) Handles Button1Click

Dim by As Byte()

Dim sfd As New SaveFileDialog

sfdInitialDirectory = EnvironmentGetFolderPath(EnvironmentSpecialFolderMyComputer)

sfdFilter = "test(test)|testa"

If sfdShowDialog = DialogResultOK Then

Dim stream As Stream = FileOpen(sfdFileName, FileModeCreate)

Dim formatter As New BinaryFormatter()

formatterSerialize(stream, tClass)

streamClose()

by = FileReadAllBytes(sfdFileName)

FileWriteAllBytes(sfdFileName, EncryptionDESEncryptDES(by, "05320532"))

End If

End Sub

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